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Signal to noise and distortion ratio

`r = sinad(x)`

`r = sinad(x,fs)`

`r = sinad(pxx,f,'psd')`

`r = sinad(sxx,f,rbw,'power')`

```
[r,totdistpow]
= sinad(___)
```

`sinad(___)`

`[`

returns the total noise and harmonic
distortion power (in dB) of the signal.`r`

,`totdistpow`

]
= sinad(___)

`sinad(___)`

with no output arguments
plots the spectrum of the signal in the current figure window and
labels its fundamental component. It uses different colors to draw
the fundamental component, the DC value, and the noise. The SINAD
appears above the plot.